Sarker Md Touhiduzzaman, Shang Xiuguo, Chen Wei, Xu Runsheng, Wang Shuang, Xia Weiguang, Zhang Yanan, Jin Chenglong, Wang Shenglin, Zheng Chuntian, Elokil Abdelmotaleb
Institute of Animal ScienceState Key Laboratory of Livestock and Poultry BreedingKey Laboratory of Animal Nutrition and Feed Science in South China, Ministry of Agriculture and Rural AffairsGuangdong Public Laboratory of Animal Breeding and Nutrition; Guangdong Key Laboratory of Animal Breeding and Nutrition, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China.
College of Animal Science, Foshan University, Foshan, 528225, China.
Biol Trace Elem Res. 2025 Apr;203(4):2257-2270. doi: 10.1007/s12011-024-04308-z. Epub 2024 Aug 24.
The present study aimed to optimize the combined effect of dietary selenium (SE) and iodine (ID) on the productive and reproductive performance and antioxidant capacity of Longyuan breeding ducks. A total of 288 Longyan duck breeders aged 20 wk were randomly assigned to four groups with six replicates (n = 72 ducks/group; 12 ducks/replicate). A 2 × 2 factorial arrangement experiment was performed and included 2 supplementation levels of each SE and ID for 200 days of the experimental period. The first group (SE0/ID0) received a basal diet without SE or ID supplementation and was considered to be the control group, whereas the other three groups, SE0/ID4, SE2/ID0 and SE2/ID4, received a basal diet supplemented with 0.4 mg ID/kg, 0.2 mg SE/kg or 0.2 mg SE supplemented with 0.4 mg ID/kg, respectively. The results indicated that the albumin height of the SE2/ID0 group was lower (P < 0.05) than that of the control group, that the egg shape index of the SE2/ID4 and SE0/ID4 groups were lower (P < 0.05) than that of the control group (SE0/ID0), and that the SE concentration significantly increased (P < 0.05) in the SE2/ID0 and SE2/ID4 groups. Hatchability and embryonic mortality improved (P < 0.05) in the SE2/ID0 group. Plasma GSH-Px activity was increased (P < 0.05) by reducing the concentration of malondialdehyde (MDA) in the SE groups. In addition, the tibia length significantly increased (P < 0.05) in the ID (SE0/ID4 and SE2/ID4) groups compared with that in the control group, the plasma content of IGF-1 in the SE2/ID4 and SE0/ID4 groups were greater (P < 0.05) than that in the control group, and the bone mineral content increased (P > 0.05) in the SE2/ID0 and SE0/ID0 groups. Compared with those in the other groups, the mRNA expression of antioxidant-related genes, including Nrf2 and SHMT1 in the SE2/ID4 group was upregulated (P > 0.05), especially in the SE2/ID4 group. Overall, dietary treatment with SE2/ID4 (0.2 mg SE in 0.4 mg ID/kg diet) could be a suitable feed supplement for improving the the egg quality, health status, endogenous antioxidant content, antioxidant-related gene expression and pre-hatching quality of Longyuan duck breeders.
本研究旨在优化日粮中硒（SE）和碘（ID）对龙源种鸭生产性能、繁殖性能及抗氧化能力的联合作用。选取288只20周龄的龙岩种鸭，随机分为四组，每组六个重复（每组n = 72只鸭；每个重复12只鸭）。进行了2×2析因试验，在200天的试验期内，每种SE和ID各设2个添加水平。第一组（SE0/ID0）饲喂不添加SE或ID的基础日粮，作为对照组，而其他三组，SE0/ID4、SE2/ID0和SE2/ID4，分别饲喂添加0.4 mg ID/kg、0.2 mg SE/kg或0.2 mg SE加0.4 mg ID/kg的基础日粮。结果表明，SE2/ID0组的蛋白高度低于对照组（P < 0.05），SE2/ID4组和SE0/ID4组的蛋形指数低于对照组（SE0/ID0）（P < 0.05），SE2/ID0组和SE2/ID4组的SE浓度显著升高（P < 0.05）。SE2/ID0组的孵化率和胚胎死亡率得到改善（P < 0.05）。SE组通过降低丙二醛（MDA）浓度增加了血浆谷胱甘肽过氧化物酶（GSH-Px）活性（P < 0.05）。此外，与对照组相比，ID组（SE0/ID4和SE2/ID4）的胫长显著增加（P < 0.05），SE2/ID4组和SE0/ID4组的血浆胰岛素样生长因子-1（IGF-1）含量高于对照组（P < 0.05），SE2/ID0组和SE0/ID0组的骨矿物质含量增加（P > 0.05）。与其他组相比，SE2/ID4组中包括核因子E2相关因子2（Nrf2）和丝氨酸羟甲基转移酶1（SHMT1）在内的抗氧化相关基因的mRNA表达上调（P > 0.05），尤其是在SE2/ID4组中。总体而言，日粮添加SE2/ID4（0.4 mg ID/kg日粮中添加0.2 mg SE）可能是一种合适的饲料添加剂，可提高龙源种鸭的蛋品质、健康状况、内源性抗氧化剂含量、抗氧化相关基因表达及孵化前质量。
